Type-writing machine.



L .NEY. TYPE WRITING MAGHINE. APPLICATION FILED 23.24, 1909. RENEWEDNOV. 16, 1909.

Patented Jan.17, 1911.

FIG. 5.

im i 1n: NflRRIS PETERS cm, WASHINGTON b. c.

tinrrn s ra less PATENT F LOO'IS NEY, OF HARTFORD, CONNECTICUT, ASSIGNORTO UNDERWOOD TYPEWRITER COMPANY, OF NEVJ YORK, N. Y., A CORPORATION OFNEW JERSEY.

TYPE-V7RITING MACHINE.

To all whom it may concern:

Be it known that I, LOUIS NEY, a citizen of the United States, residingin Hartford, in the county of Hartford and State of Connecticut, haveinvented certain new and useful Improvements in TypeJ/Vriting Machines,of which the following is a specification.

This invention relates to devices for re leasably connecting the platento the linespace wheel of a typewriting machine, to permit the platen tobe rotated independently of the line space wheel when required.

The principal object of this invention 18 to provide, at a low cost, asimple device of this character readily applicable to existing machines,conveniently manipulated, and not liable to get out of order.

In the form of the invention illustrated in the drawings, the line-spacewheel, which is loosely mounted on the platen axle, is provided with afriction ring or drum. A split friction ring is disposed around theinner periphery of the drum. A pair of dogs or levers, both within thefriction drum, have jaws which act on the ends of the split frictionring, to expand it against the inner periphery of the drum, for bindingor connecting the line-space wheel to the platen. The dogs are set bymeans of a hand-wheel, which is slidable on the end of the platen axle,and is also useful for rotating the platen. The hand wheel when pressedalong the axle effects the locking movements of the dogs by means of ataperingprojection, which enters between the ends of the long arms ofthe dogs, to wedge or force them apart and cause the jaws to open,thereby forcing the friction band to expand against the inner peripheryof the drum on the line-space wheel, to connect the latter to theplaten. To detain the hand-wheel in the platen-locking position, contactpieces are provided 011 the arms of the dogs to enter slight depressionsin the back part of the wedge-shaped projection. The arms and otherparts may be sufliciently springy to permit the contacts to enter saiddepressions. These contacts are preferably adjustable, consisting ofscrews, to vary the biting action of the split ring on the frictiondrum.

1n the accompanying drawings, Figure 1 is a view of the platen andplaten frame of Specification of Letters Patent.

Application filed April 24,1909, Serial No. 491,921.

Patented Jan. 17, 1911.

Renewed November 16, 1909. Serial No. 528,376.

an Underwood front strike writing machine, with the present improvementsapplied thereto. Fig. 2 is a sectional end view taken on the line ea,Fig. a, showing the improved device in the released or disconnectedposition. Fig. 8 is a sectional end view taken on the line bb, Fig. 5,showing the improved device in the locked or connected position. Fig. 1is a side view, partly in section and partly in outside elevation,corresponding to Fig. 2 and showing the device in the released ordisconnected position. Fig. 5 is a view similar to F 4-, but showing thedevice in the locked or connected position. Fig. 6 shows perspectiveviews of several parts embodied in this invention. I

The usual cylindrical platen 1 is fixed to an axle 2, whereby it isjournaled in a platen frame 3. Loose upon the platen axle 2, outside ofthe platen frame 3, is a toothed linespace wheel 5, usually engaged by aspring detent 6. Fixed to the line-space wheel 5 is a friction ring ordrum 7, forming a part of the clutching mechanism. A split ring clutch10 is arranged around the inner periphery of the drum 7. A pair of dogsor levers 11 is fulcrumed at 8 upon a plate 9, both within the drum 7,and have jaws 12 which act in the ends 18 of the split ring 10, toexpand it against the inner periphery of the drum 7. The plate 9 isfixed on the platen axle 2, and is preferably shaped as shown in thedrawings, to afford a bearing surface or support for the dogs 11, whenthey are wedged apart. The movement of the dogs 11 is effected by ahand-wheel 14:, which for this purpose is slidable 0n the end of theplaten axle 2. This hand-wheel, which is also useful for rotating theplaten 1, has a hub 15, whereby it is splined to the axle 2; aprojection 16 on the platen axle 2 fitting in the slot 17 in said hub15. The hand-wheel, when pressed to the right, effects the movements ofthe dogs by means of a tapering projection 18, said projection beingpreferably on a split collar 19 fixed on the hub 15 by means of asetscrew 20. This projection 18 enters between the ends of the long armsof the dogs 11, to wedge or force them apart and cause the jaws 12 toopen or expand, and force the friction band 10 against the innerperiphery of the drum 7 on the line-space wheel 5, to connect the latterto the platen l. A disk 21, fixed upon said expanding means including ahand posts 22, secured in the plate J, may serve as a cover for thedrum.

To detain the hand-wheel 1-1 in the platenlocking position, contactpieces 23 are provided on the arms of the dogs 11, to enter slightdepressions 24: in the back of the wedge shaped part or the projection18. The dogs 11 and other parts may be split ciently springy to permitthe contact 23 to enter said depressions 2%. These contacts 23 arepreferably adjustable, consisting of screws, to vary the biting actionof the split friction band 10 on the friction drum T.

To limit the outward sliding movement of the hand-wheel l t, screw 25,threaded into the axle 2, engages a shoulder 26, formed 011 the centralsleeve 27 ot' the hand-wheel lat.

Having thus described my invention, I claim:

1. in a typewriting machine, the combination with a platen and an axletherefor, of a line-space Wheel having a friction ring or drum andloosely mounted on the platen axle, a pair of dogs or levers tulcrumedat one of their extremities, a split ring arranged around the innerperiphery oi the drum on the line-space wheel, the split or open endsengaging with jaws on the dogs or levers, and means to cause the dogs toexpand the split ring against the inner periphery of the drum on theline-space wheel, to connect or bind the latter to the platen.

In a typewriting machine, the combination with a platen and an axletherefor, of a line-space wheel having a friction ring or drum andloosely mounted on the platen axle, a plate fixed on the platen axlewithin the drum on the line-space wheel, and a pair of dogs or leversfulcrumed at one of their extremities on said platen, which is so shapedthat when the dogs are operated the ends of the long arms of the dogswill bear against the plate to prevent any binding or buckling of theseparts, a split ring arranged around the inner periphery of the drum onthe line-space wheel, the split. or open ends engaging with jaws on thedogs or levers, and means to cause the dogs to expand the split ringagainst the inner periphery of the drum on the line-space wheel, toconnect or bind the latter to the platen.

3. In a typewriti machine, the combination with a platen and an axletherefor, of a line-space wheel having a .t'riction ring or drum andloosely mounted on the platen axle, a pair of dogs or le ers tulcrumedat one of their extremities, a split ring arranged around the innerperiphery of the drmn on the line-space wheel, the split or open endsengaging with jaws on the dogs or levers, and means to cause the dogs toexpand the split ring against the inner periphery of the drum on theline-space wheel, to connect or bind the latter to the platen,

- wheel and hub splined on the platen axle,

and movable along the axle to operate said dogs.

st. in a typewriting machine, the combination with a platen and an. axletherefor, of a line-space wheel having a :triction ring or drum andloosely mounted on the platen axle, a pair of dogs or levers fulcrmnedat one of their extremities, a split ring arranged around the innerperiphery of the drum on the line-space wheel, the split or open endsengaging with jaws on the (logs or levers, and means to cause the dogsto expand the split ring against the inner peripl'iery ot the drum onthe line-space wheel, to connect or bind the latter to the platen, saidexpanding means including a hand wheel and hub splincd on the platenaxle, and movable along the axle to operate said dogs, a taperingprojection being provided on the hub oi the hand-wheel, to insertbetween the ends of the arms of the dogs or levers, to force them apartand turn the lovers on their tulcrums and cause their jaws to open orexpand.

In a typewriting machine, the combination with a platen and an axletherelj'or, of a line-space wheel having a friction ring or drumandloosely mounted on the platen axle, a pair of dogs or leverstulcrmned at one of their extremities, a split ring arranged around theinner periphery of the drum on the line-space wheel, the split or openends engaging with jaws on the dogs or lovers, means to cause the dogsto expand the split ring against the inner periphery of the drum on theline-space wheel, to connect or bind the latter to the platen, saidexpanding means including a hand wheel and hub splined on the platenaxle, and movable along the axle to operate said dogs, a taperingprojection being provided on the hub ot the ha rid-wheel, to insertbetween the ends of the arms of the dogs or levers, to force them apartand turn the levers on their tulcrunis and cause their jaws to open orexpand, and means for detaining the handwher-l in the platen-lockingposition.

G. in a typewriting machine, the combination with a platen and an axletherefor, ot a line-space wheel l'iaving a friction ring or drum andloosely mounted on the platen axle, a pair of dogs or levers 'lulcrumedat one off their extremities, a split ring arranged around the innerperiphery oi the drum on the line-space wheel, the split or open endsengaging with jaws on the dogs or levers, means to cause the dogs toexpand the split ring against the inner periphery of the drum on theline-space wheel, to connect or bind the latter to the platen, saidexpanding means including a hand. wheel and hub splined on the platenaxle, and movable along the axle to operate said dogs, a taperingprojection being provided on the hub of the hand-wheel, to insertbetween the ends of the arms of the dogs or levers, to force them apartand turn the levers on their fulcrums and cause their jaws to open orexpand, and means for detaining the hand-wheel in the platen-lockingposition, consisting of contact points provided on the ends of the dogsor levers to enter depressions in the back of the ta pered part of theprojection on the handwheel, the parts being sufiiciently springy topermit the contacts to enter said depressions.

7 I11 a typewriting machine, the combination with a platen and an axletherefor, of a line-space wheel having a friction ring or drum andloosely mounted on the platen axle, a pair of dogs or levers fulcrumedat one of their extremities, a split ring arranged around the innerperiphery of the drum on the line-space wheel, the split or open endsengaging with jaws on the dogs or levers, means to cause the dogs toexpand the split ring against the inner periphery of the drum on theline-space wheel, to connector bind the latter to the platen, saidexpanding means including a hand wheel and hub splined on the platenaxle, and movable along the axle to operate said dogs, a taperingprojection being provided on the hub of the hand-wheel, to insertbetween the ends of the arms of the dogs or levers, to force them apartand turn the levers on their fulcrums and cause their jaws to open orexpand, and means for detaining the handwheel in the platen-lockingposition, consisting of contact points provided on the ends of the dogsor levers to enter depressions in the back of the tapered part of theprojection on the hand-wheel, the parts being sufiiciently springy topermit the contacts to enter said depressions, said contacts beingadjustable, to vary the biting action of the split ring on the frictiondrum. 8. In a typewriting machine, the combination with a platen and anaxle therefor, of a line-space wheel loosely mounted on the axle andhaving a friction ring or drum, a split ring within said drum, a pair ofdogs also within the drum and provided with jaws to act upon the ends ofthe split ring to expand it against the inner periphery of the drum, anda platen-rotating hand wheel slidable along the platen axle and havingmeans to operate said dogs.

9. In a typewriting machine, the combination with a platen and an axletherefor,

of a line-space wheel loosely mounted on the axle and having a frictionring or drum, a split ring within said drum, a pair of dogs also withinthe drum and provided with jaws to act upon the ends of the split ringto expand it against the inner periphery of the drum, and aplaten-rotating hand wheel slidable along the platen axle and havingmeans to operate said dogs; said hand wheel having a tapering projectionto enter between arms provided upon the dogs to Wedge them apart tocause the dogs to expand the friction ring.

10. In a typewriting machine, the combination with a platen and an axletherefor, of a line-space wheel loosely mounted on the axle and having afriction ring or drum, a split ring within said drum, a pair of dogsalso within the drum and provided with jaws to act upon the ends of thesplit ring to expand it against the inner periphery of the drum, and aplaten-rotating hand wheel slidable along the platen axle and havingmeans to operate said dogs; said hand wheel having a tapering projectionto enter between arms provided upon the dogs to wedge them apart tocause the dogs to expand the friction ring; contact pieces be ingprovided upon the dogs to enter depressions in the tapering projectionto detain the hand wheel in platen locking position.

11. In a typewriting machine, the combination with a platen and an axletherefor, of a linespace wheel loosely mounted on the axle and having afriction ring or drum,

a split ring within said drum, a pair of dogs also within the drum andprovided with jaws to act upon the ends of the split ring to expand itagainst the inner periphery of the drum, and a platen-rotating handwheel slidable along the platen axle and having means to operate saiddogs; said hand wheel having a tapering projection to enter between armsprovided upon the dogs to wedge them apart to cause the dogs to expandthe friction ring; contact pieces being provided upon the dogs to enterdepressions in the tapering projection to detain the hand wheel inplaten locking position, said contact pieces being adjustable to varythe biting action of the split ring upon the friction drum.

LOUIS NEY.

Witnesses:

IV. M. BYORKMAN, LYMAN D. BROUGHTON.

